_江苏成考网

Before you leave the classroom，_____all the lights.

• A、turn up 

• B、turnover

• C、turn to

• D、turn off

51.          

Why can't some farmers find enough workers to pick fruit?

• A、They grow too many peach trees.

• B、People prefer well-paid construction jobs.

• C、Few people want to work in California.

• D、Theydon't want to hire workers from Mexico.